What caused world war 1 and the russian revolution and what effect did they have on world events?

Brainliesttt !me : ) what brought about the end of the soviet union?

Which statement describes the impact of the 21st amendment?

What event started the space race and made americans feel their security was threatened a.) alan shepard's suborbital flight. b.) the launch of sputnik c.) the launch of explorer d.) the cuban missle crisis